摘要
金川公司尾矿酸浸液中除含有较高含量的铁和镁之外,还含有一定量的杂质锰。应用热力学原理计算并分析了硫酸锰与次氯酸钠反应的活性,以次氯酸钠为氧化剂、氧化镁为中和剂,通过正交设计与实验,得到了从该酸浸液中除锰的最佳工艺条件,并进行了除锰实验。将除锰滤液进一步除钙以及蒸发浓缩、冷却结晶得到了七水硫酸镁,其主含量为98.4%(质量分数),符合HG/T 2680—2009《工业硫酸镁》Ⅰ类一等品质量指标。
The acid leaching filtrate of tailings from Jinchuan Company contains not only large amount of Fe2＋ and Mg2＋, but also small amount of Mn2＋ impurity.The reactive activity of MnSO4 with NaCIO was thermodynamically calculated and analyzed. Moreover, with NaCIO as oxidant and MgO as neutralizer, the optimum technological conditions of removal of manganese from the acid leaching filtrate were obtained by orthogonal experiments.Under the optimum conditions manganese was removed.Subsequently, Ca was further eliminated through heat filtration and MgSO4·7H2O was prepared by cooling and crys- tallizing the filtrate.Purity of the as-prepared MgSO4·7H2O was 98.4% （mass fraction）, which can be classified as the first-rate product of type I according to the standard of HG/T 2680-2009.
出处
《无机盐工业》
CAS
北大核心
2012年第11期45-48,共4页
Inorganic Chemicals Industry
基金
金川集团重大科技攻关项目(2010-8)
关键词
尾矿酸浸液
除锰
氧化剂
七水硫酸镁
acid leaching filtrate of tailings
removal of manganese
oxidizer
MgSO4·7H2O
